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Error Vector-Based Measurement Method for Radiofrequency Digital Transmitter Troubleshooting

机译:基于误差矢量的射频数字发射机故障诊断测量方法

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摘要

The rapid growth of modern telecommunications systems has created the need to get new test equipment and measurement techniques operational in a very short time. Performance assessment of radiofrequency digital transmitters, with special regard to the troubleshooting of their I/Q modulation section, calls for new, reliable, and time-effective measurement methods because those based on the analysis of constellation diagrams, currently supported by major manufacturers, show some intrinsic limitations. To overcome these limitations, a new measurement method based on the use of the error vector is proposed in the paper. It works properly when only one or two I/Q impairments are significant, and assures comparable accuracy and reduced measurement time with respect to other solutions already presented in the literature. Besides describing the fundamental steps and basic relations characterizing the proposed method, the paper gives details of the extended experimental activity carried out on actual telecommunication signals in order to assess the performance.
机译:现代电信系统的迅速发展,导致了在很短的时间内使新的测试设备和测量技术投入使用的需求。射频数字发射机的性能评估,特别是对其I / Q调制部分的故障排除,要求采用新颖,可靠且省时的测量方法,因为这些方法基于星座图分析,目前得到了主要制造商的支持一些固有的局限性。为了克服这些限制,本文提出了一种新的基于误差矢量的测量方法。当只有一个或两个I / Q损伤很严重时,它可以正常工作,并且与文献中已有的其他解决方案相比,可以确保相当的精度和减少的测量时间。除了描述该方法的基本步骤和基本关系外,本文还详细介绍了对实际电信信号进行的扩展实验活动,以评估其性能。

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